Question

Given below are two reactions "A" abd "B". They are made to react with aqueous base NaOH.

Which of the following is/are correct

• A. A yields an epoxide while B gives a ketone
• B. A yields a ketone while B gives an epoxide
• C. Both A and B yield cyclohexanone
• D. Both A and B yield the same epoxide

Answer 1

The correct option is A

A yields an epoxide while B gives a ketone

For both cases, before rushing to conclusions, see if ring flip yields any possibilities.
That way, if you can make a case for gretaer stability, it should make better sense:

For the trans isomer,

For the cis isomer, elimination happens well: